EP2674585B1 - Lightweight acoustic muffler - Google Patents

Lightweight acoustic muffler Download PDF

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Publication number
EP2674585B1
EP2674585B1 EP13170271.4A EP13170271A EP2674585B1 EP 2674585 B1 EP2674585 B1 EP 2674585B1 EP 13170271 A EP13170271 A EP 13170271A EP 2674585 B1 EP2674585 B1 EP 2674585B1
Authority
EP
European Patent Office
Prior art keywords
silencer
housing
sandwich plate
muffler
exhaust gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13170271.4A
Other languages
German (de)
French (fr)
Other versions
EP2674585A1 (en
Inventor
Georg Wirth
Bernd Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
Eberspaecher Exhaust Technology GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eberspaecher Exhaust Technology GmbH and Co KG filed Critical Eberspaecher Exhaust Technology GmbH and Co KG
Publication of EP2674585A1 publication Critical patent/EP2674585A1/en
Application granted granted Critical
Publication of EP2674585B1 publication Critical patent/EP2674585B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/007Apparatus used as intake or exhaust silencer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/141Double-walled exhaust pipes or housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/148Multiple layers of insulating material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F01N13/1894Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/24Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00Structure, disposition or shape of gas-chambers
    • F01N2490/08Two or more expansion chambers in series separated by apertured walls only
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00Structure, disposition or shape of gas-chambers
    • F01N2490/15Plurality of resonance or dead chambers
    • F01N2490/155Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00Selection of materials for tubes, chambers or housings
    • F01N2530/26Multi-layered walls

Definitions

  • the present invention relates to a silencer for an exhaust system of an internal combustion engine, in particular of a motor vehicle.
  • the invention further relates to an exhaust system with such a silencer and an internal combustion engine with such an exhaust system.
  • Silencers typically include a housing that encloses a muffler volume, and at least one inlet tube and at least one outlet tube.
  • the muffler can then be fluidly connected to the rest of the exhaust system via the inlet pipe and the outlet pipe.
  • the muffler may also comprise at least one holding element with which the muffler can be attached to a support structure, for example the internal combustion engine of a motor vehicle.
  • a support structure for example the internal combustion engine of a motor vehicle.
  • the GB 2 352 480 A a silencer with a sandwich plate.
  • the WO 2012/055949 A1 discloses a silencer having a housing with a sandwich plate forming part of a housing shell.
  • the present invention addresses the problem of providing a muffler of the type mentioned an improved embodiment, which is particularly suitable for the realization of a lightweight construction. This problem is solved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.
  • the muffler according to the invention has a sandwich plate, wherein this sandwich plate forms a part of a housing shell of the housing of the muffler.
  • the muffler further comprises a self-supporting support structure, which in turn comprises a tube assembly which is at least partially disposed in the housing interior.
  • This pipe arrangement may comprise, for example, an exhaust gas supply line and an exhaust gas discharge line, by means of which exhaust gas from an exhaust system of an internal combustion engine including the sound to be damped supplied to the muffler and can be discharged therefrom again.
  • the tube assembly can be supported mechanically stable in the housing of the muffler.
  • the sandwich panel according to the invention can be used, which is flat for optimum attachment of the muffler to the subfloor and yet has a very high mechanical stability.
  • the silencer according to the invention can also be mounted in the space in a motor vehicle usually spatially very limited space and, if necessary, this form correspondingly flat.
  • each such sheet metal panel layer may have a thickness of about 0.1 mm, the total weight of such a sandwich panel compared to conventional sheet metal walls with a thickness of sheet metal wall 1.5 mm significantly reduced and thus particularly suitable for stiffening large areas.
  • sandwich panels in silencers (instead of conventional sheet metal walls) can thus achieve a significant weight savings.
  • the muffler according to the invention can consequently be manufactured in lightweight construction, it being ensured at the same time that the mechanical or mechanical bending moments required for the reception and transmission of the muffler are present.
  • the self-supporting support structure comprises at least one intermediate floor.
  • Such an intermediate floor can be used to support the pipe arrangement on the self-supporting support structure and thus further improve the mechanical stability of the muffler.
  • the sandwich panel is part of the self-supporting support structure. This allows a particularly good transmission of forces or torques supplied to the muffler via the self-supporting support structure, for example to a discharge line of the pipe arrangement.
  • the muffler comprises a jacket hood, which completes the sandwich panel to the housing shell of the housing of the muffler according to the invention.
  • the muffler has a first and a second end floor, which complete the housing shell to the housing.
  • the first or second end floor can each be adhesively bonded, soldered or welded to the housing jacket, so that the housing jacket with the two end floors forms a gas-tight housing. Since the two end floors have no supporting function, these may also be preferably formed as a thin sheet metal walls.
  • the jacket cover can be integrally connected to the first and / or to the second end floor. This means that the jacket hood as well as the first and second end floor form a single workpiece, which in the manner of a hood connected to the sandwich panel and in particular this welded can be.
  • the jacket hood integrally connected to the first and second end floor can be designed in the manner of a shell.
  • the shell hood in a longitudinal section of the muffler have two edge portions for attachment to the at least one sandwich panel, which, to the outside, away from the housing interior of the muffler , or inwards, towards the housing interior, stand out.
  • the first or / and second end floor of the silencer can each have a first or second through-opening.
  • the crude arrangement may comprise at least one supply and discharge pipe with a supply or discharge opening, which are performed through the first and second through-openings from the outside into the housing interior, such that the supply or discharge opening in the at least a chamber of the muffler is arranged.
  • the at least one intermediate bottom can have a first and a second end section, the first end section then being attached to the first sandwich panel and the second end portion can be supported on the further sandwich panel or on the jacket hood.
  • At least one through-opening may be provided in the intermediate bottom in an area arranged between the two end sections, through which the at least one supply or discharge pipe can be made. In this way, the supply and discharge pipe can be mechanically supported particularly stable in the muffler.
  • the at least one intermediate floor may be an additional sandwich panel (in addition to the first and second sandwich panels).
  • a particularly high mechanical stability can be achieved in the silencer according to the invention by means of the additional sandwich plate.
  • the at least one intermediate floor may also be a sheet metal wall. This variant is particularly preferable when the mechanical stability does not have to be substantially increased by means of the intermediate bottom, so that the sheet metal wall can serve, for example, as a pure partition for separating the chamber in the housing interior into a first and second sub-chamber, by means of which in Sound absorber introduced sound can be particularly well damped.
  • the sandwich panel can be connected to the other sandwich panel or the jacket hood by means of welding, gluing or soldering.
  • the at least one sandwich panel in a longitudinal section profile of the muffler may have a first and second end section with respect to the longitudinal direction, in which a wall thickness of the sandwich panel has a lower value than in one arranged between the two end sections Area of the sandwich panel.
  • the sandwich panel can then be riveted to the two end portions with complementary to these two end portions edge portions of the jacket cover.
  • the invention further relates to an exhaust system, in particular for an internal combustion engine of a motor vehicle, with an exhaust gas removal pipe for discharging exhaust gas from the exhaust system and with a silencer with one or more of the aforementioned features.
  • the tube assembly of the muffler may have a fluidically connected to the exhaust gas discharge pipe feed pipe.
  • the present invention further relates to an internal combustion engine having a combustion chamber and an exhaust system with one or more of the aforementioned features, wherein the combustion chamber of the internal combustion engine can be fluidly connected to the exhaust system by means of a connecting pipe.
  • FIG. 1 shows the muffler 1 while in a longitudinal sectional view, the FIG. 2 in a side view.
  • the silencer 1 comprises a housing 2, which has a housing jacket 3 extending in a circumferential direction U of the housing.
  • the silencer 1 further comprises a housing interior 4 having at least one chamber 8, which is enclosed by the housing 2, as well as a self-supporting support structure 5 and a sandwich plate 6.
  • the sandwich panel 6 forms a part of the housing shell 3.
  • the self-supporting support structure 5 comprises a tube arrangement 7, which is arranged partially in the housing interior 4.
  • the muffler 1 further comprises a jacket hood 9, which completes the first sandwich panel 6 to the housing shell 3 (see. FIG. 2 ).
  • the sandwich panel 6 may be connected to the jacket hood 9 by means of welding, gluing or soldering.
  • the jacket hood 9 due to their shell-like design completes the sandwich panel 6 not only to the housing shell 3, but to the entire housing 2. This means in particular that for the completion of the housing shell 3 no additional end floors are required, which greatly simplifies the construction and thus the production of the silencer 1 according to the invention.
  • the shroud 9 may also be considered integral with first and second end bottoms.
  • the muffler 1 ' in one in the FIG. 3 shown, not belonging to the invention variant of the embodiment of FIG. 1 the muffler 1 'as an alternative to the jacket hood 9, a further sandwich panel 10', which is part of the self-supporting support structure, and a first and a second metal wall 11 ', 12' include. These then complete together the first sandwich panel 6 'to the housing shell 3'.
  • the FIG. 4 shows the muffler 1 'of FIG. 3 according to the section line IV
  • the FIG. 5 shows the muffler 1 'according to the section line V.
  • the sandwich panel 6 'and the further sandwich panel 10' as well as the first and second panel wall 11 ', 12' may be arranged in the cross-sectional profile of the muffler 1 ', preferably substantially opposite one another. In principle, however, other arrangement geometries are also conceivable in further variants.
  • the first and second sheet metal walls 11 ', 12' simultaneously also form a first and a second end floor 13 ', 14', which complete the housing shell 3 'to the housing 2', ie the sheet metal walls 11 ' , 12 'and the end floors 13', 14 'are integrally connected to each other and form a frame-like structure in the manner of a circumferential U-profile (see. Fig. 4 and 5 ) out.
  • the sheet metal walls 11 ', 12' and the end floors 13 ', 14' but also each formed separately and welded together.
  • the end floors 13 ', 14' or the metal walls 11 ', 12' can be glued or soldered to the sandwich panels 6 ', 10'.
  • the jacket bottom 9 has a first or second through-opening 15, 16, and that the tube structure 7 of the muffler 1 comprises a supply and a discharge pipe 17, 18 with a supply or discharge opening 19, 20, which are performed by the first and second passage opening 15, 16 from the outside into the housing interior 4.
  • the supply or discharge opening 19, 20 is arranged in the chamber 8.
  • the first or second passage opening 15 ', 16' in the first and second end floor 13 ', 14' may be provided (see. Fig. 3 ).
  • FIGS. 1 . 3 and 5 shown two shelves 21, 21 ', each having a first and a second end portion 22, 23, 22', 23 ', wherein the first end portion 22, 22' on the first sandwich panel 6, 6 'and the second end portion 23, 23rd ', at the on the jacket hood 9 (see. Fig. 1 ) or on the second sandwich panel 10 '(cf. Fig. 4 ) is supported.
  • the intermediate floors 21, 21 ' can be glued or soldered to the sandwich panels 6, 6', 10 'and welded to the jacket hood 9, to the sheet metal walls 11', 12 'and to the end floors 13, 14'.
  • passage openings 24, 24' are provided in a region arranged between the first and second end sections, through which passages or discharge pipes 17, 18, 17 ', 18' are made. It is clear that in variants also a different number of intermediate floors may be provided in the muffler 1,1 '.
  • the intermediate floors 21, 21 ' are formed as thin sheet metal walls.
  • they can basically be designed either as a mechanically particularly stable sandwich panel or as a thin sheet-metal wall to be produced particularly inexpensively.
  • combinations such that individual shelves 21, 21 'as a thin sheet metal wall and other shelves 21, 21' are formed as sandwich panels are conceivable.
  • the at least one sandwich panel 6, 6 'or / and the at least one intermediate floor 21, 21' may be part of the self-supporting support structure 5.
  • the jacket hood 9 for particularly stable attachment to the sandwich panel 6 in a longitudinal section profile of the muffler 1 may have two edge portions 25 which project outwardly away from the housing interior 4.
  • the edge portions 25 of course also inwardly, the housing interior 4 out, stand out.
  • the sandwich panel 6, 6 'in the longitudinal section profile of the muffler 1 have a first and second end portion 26 with respect to a longitudinal direction L of the muffler 1 in which a wall thickness D of the sandwich panel 6 is lower than D 1
  • the end portions 26 may also be formed as folded portions which surround the edge portions 25 of the jacket hood 9.
  • the jacket hood 9 can then additionally be fastened to the sandwich panel 6 by gluing or soldering.
  • the edge portions 25 of the jacket hood 9 are formed as folded portions which engage around the end portions 26 of the sandwich panel 6.
  • the sandwich panel 6 for the purpose of a particularly stable attachment to the jacket hood 9 in the region 25 or 26 riveted (see reference numeral 32 in the FIG. 6 ).
  • the muffler 1 can be part of an exhaust system 27, in particular for an internal combustion engine of a motor vehicle, which in turn can be equipped with an exhaust gas exhaust pipe 30 for discharging exhaust gas from the exhaust system 27.
  • the exhaust gas removal pipe 30 is fluidly connected to the supply pipe 17 of the muffler 1.
  • the exhaust system 27 in turn may be part of an internal combustion engine 28 having a combustion chamber 29, wherein the combustion chamber 29 of the internal combustion engine 28 is fluidly connected to the exhaust system 27 by means of a connecting pipe 31.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

Die vorliegende Erfindung betrifft einen Schalldämpfer für eine Abgasanlage einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs. Die Erfindung betrifft weiterhin eine Abgasanlage mit einem solchen Schalldämpfer sowie eine Brennkraftmaschine mit einer solchen Abgasanlage.The present invention relates to a silencer for an exhaust system of an internal combustion engine, in particular of a motor vehicle. The invention further relates to an exhaust system with such a silencer and an internal combustion engine with such an exhaust system.

Schalldämpfer umfassen üblicherweise ein Gehäuse, welches ein Schalldämpfervolumen umschließt, sowie zumindest ein Einlassrohr und wenigstens ein Auslassrohr. Über das Einlassrohr und das Auslassrohr ist der Schalldämpfer dann fluidisch an die übrige Abgasanlage anschließbar. Der Schalldämpfer kann außerdem zumindest ein Halteelement aufweisen, mit dem der Schalldämpfer an einer Haltestruktur, beispielsweise der Brennkraftmaschine eines Kraftfahrzeugs, befestigt werden kann. Bei Fahrzeuganwendungen ist es üblich, die Abgasanlage entlang eines Unterbodens des Kraftfahrzeugs zu verlegen. Da im Unterbodenbereich nur vergleichsweise wenig Einbauraum zur Verfügung steht, können Schalldämpfer vergleichsweise flach konzipiert werden, wobei ihr Gehäuse dann zumindest einen ebenen Wandbereich aufweisen kann, welcher im montierten Zustand beispielsweise dem Unterboden des Kraftfahrzeugs oder auch einer Fahrbahn zugewandt ist.Silencers typically include a housing that encloses a muffler volume, and at least one inlet tube and at least one outlet tube. The muffler can then be fluidly connected to the rest of the exhaust system via the inlet pipe and the outlet pipe. The muffler may also comprise at least one holding element with which the muffler can be attached to a support structure, for example the internal combustion engine of a motor vehicle. In vehicle applications, it is common practice to lay the exhaust system along a subfloor of the motor vehicle. Since only comparatively little installation space is available in the underbody area, mufflers can be designed to be relatively flat, with their housing then having at least one flat wall area, which in the assembled state faces, for example, the underbody of the motor vehicle or even a roadway.

Zur Reduzierung des Kraftstoffverbrauchs des den Schalldämpfer verwendenden Kraftfahrzeugs kann es sinnvoll sein, das Fahrzeuggewicht so weit wie möglich zu reduzieren. Folglich gibt es auch für den in einem Kraftfahrzeug verbauten Schalldämpfer einen Bedarf, diesen möglichst leicht und folglich mit reduzierten Wandstärken herzustellen. Hierbei sind Gehäuse problematisch, die wie oben erläutert zumindest einen ebenen Wandbereich besitzen. Denn je geringer die Wandstärke eines solchen ebenen Wandbereichs ist, desto größer ist die Neigung zur Schwingungsanregung, was zu störenden Geräuschen im Betrieb des Schalldämpfers sowie zu Beschädigungen, insbesondere mechanischer Befestigungsstellen, führen kann.To reduce the fuel consumption of the motor vehicle using the muffler, it may be useful to reduce the vehicle weight as much as possible. Consequently, there is also a need for the silencer installed in a motor vehicle to produce it as easily as possible and consequently with reduced wall thicknesses. Here are housing problematic, which have as explained above at least a flat wall area. For the lower the wall thickness of such a flat wall area, the greater the tendency to Vibration excitation, which can lead to disturbing noises in the operation of the muffler and damage, in particular mechanical attachment points.

Vor diesem Hintergrund offenbart die GB 2 352 480 A einen Schalldämpfer mit einer Sandwichplatte.Against this background, the GB 2 352 480 A a silencer with a sandwich plate.

Die WO 2012/055949 A1 behandelt einen Schalldämpfer, der ein Gehäuse mit einer Sandwichplatte aufweist, die einen Teil eines Gehäusemantels bildet.The WO 2012/055949 A1 discloses a silencer having a housing with a sandwich plate forming part of a housing shell.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für einen Schalldämpfer der eingangs genannten Art eine verbesserte Ausführungsform bereitzustellen, die sich insbesondere zur Realisierung einer Leichtbauweise eignet. Dieses Problem wird erfindungsgemäß durch den Gegenstand der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.The present invention addresses the problem of providing a muffler of the type mentioned an improved embodiment, which is particularly suitable for the realization of a lightweight construction. This problem is solved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Der erfindungsgemäße Schalldämpfer weist eine Sandwichplatte auf, wobei diese Sandwichplatte einen Teil eines Gehäusemantels des Gehäuses des Schalldämpfers ausbildet. Der Schalldämpfer weist ferner eine selbsttragende Tragstruktur auf, welche wiederum eine Rohranordnung umfasst, die wenigstens teilweise in dem Gehäuse-Innenraum angeordnet ist. Diese Rohranordnung kann beispielsweise eine Abgas-Zuführungsleitung und eine Abgas-Abführungsleitung umfassen, mittels welcher Abgas aus einer Abgasanlage einer Brennkraftmaschine einschließlich des zu bedämpfenden Schalls dem Schalldämpfer zugeführt und aus diesem wieder abgeführt werden kann. Mittels des erfindungsgemäßen Schalldämpfers können sowohl Kräfte als auch mechanische Biegemomente, welche von Abgasanlage der Brennkraftmaschine oder auch der Brennkraftmaschine selbst erzeugt werden, von der Rohranordnung aufgenommen und durch den Schalldämpfer hindurchgeleitet werden.The muffler according to the invention has a sandwich plate, wherein this sandwich plate forms a part of a housing shell of the housing of the muffler. The muffler further comprises a self-supporting support structure, which in turn comprises a tube assembly which is at least partially disposed in the housing interior. This pipe arrangement may comprise, for example, an exhaust gas supply line and an exhaust gas discharge line, by means of which exhaust gas from an exhaust system of an internal combustion engine including the sound to be damped supplied to the muffler and can be discharged therefrom again. By means of the silencer according to the invention, both forces and mechanical bending moments, which are generated by the exhaust system of the internal combustion engine or of the internal combustion engine itself, are taken up by the pipe arrangement and passed through the silencer.

Auf diese Weise kann eine unerwünschte Einleitung solcher Kräfte bzw. mechanischer Biegemomente in das eigentliche Gehäuse des Schalldämpfers vermieden werden, so dass dieses wiederum entsprechend dünnwandig ausgelegt werden kann. Mittels der selbsttragenden Tragstruktur kann die Rohranordnung dabei mechanisch stabil in dem Gehäuse des Schalldämpfers abgestützt werden.In this way, an undesirable introduction of such forces or mechanical bending moments in the actual housing of the muffler can be avoided, so that this in turn can be designed correspondingly thin-walled. By means of the self-supporting support structure, the tube assembly can be supported mechanically stable in the housing of the muffler.

Von einer Zuführungsleitung der Rohranordnung dem Schalldämpfer zugeführte Kräfte bzw. Drehmomente werden also unmittelbar über die selbsttragende Tragstruktur an eine Abführungsleitung der Rohranordnung übertragen und somit wieder aus dem Schalldämpfer abgeführt, ohne dass das Gehäuse des Schalldämpfers selbst diese Kräfte aufnehmen muss. Zur Anbindung des Schalldämpfers an einen Unterboden eines Kraftfahrzeugs kann die erfindungsgemäße Sandwichplatte verwendet werden, welche zur optimalen Befestigung des Schalldämpfers an dem Unterboden flach ausgebildet ist und dennoch eine sehr hohe mechanische Stabilität aufweist. Somit lässt sich der erfindungsgemäße Schalldämpfer auch in dem in einem Kraftfahrzeug üblicherweise räumlich stark begrenzten Bauraum montieren und, falls erforderlich, hierfür entsprechend flach ausbilden. Da sich die Sandwichplatte aus mehreren (beispielweise 4 bis 5) einzelnen Blechwand-Lagen zusammensetzt, wobei jede solche Blechwand-Lage eine Dicke von ca. 0,1 mm aufweisen kann, ist das Gesamtgewicht einer solchen Sandwichplatte gegenüber herkömmlichen Blechwänden mit einer Blechwand-Dicke von ca. 1,5 mm deutlich reduziert und somit zur Aussteifung von großen Flächen besonders geeignet. Durch den Einsatz von Sandwichplatten in Schalldämpfern (anstelle von herkömmlichen Blechwänden) lässt sich also eine erhebliche Gewichtsersparnis erzielen. Der erfindungsgemäße Schalldämpfer kann folglich in Leichtbauweise hergestellt werden, wobei gleichzeitig sichergestellt ist, dass die für die Aufnahme und Übertragung von dem Schalldämpfer zugeführten Kräften bzw. mechanischen Biegemomenten notwendige mechanische Stabilität vorhanden ist.From a supply line of the pipe assembly the muffler supplied forces or torques are thus transmitted directly through the self-supporting support structure to a discharge line of the pipe assembly and thus discharged again from the muffler without the housing of the muffler itself must absorb these forces. For connection of the muffler to a subfloor of a motor vehicle, the sandwich panel according to the invention can be used, which is flat for optimum attachment of the muffler to the subfloor and yet has a very high mechanical stability. Thus, the silencer according to the invention can also be mounted in the space in a motor vehicle usually spatially very limited space and, if necessary, this form correspondingly flat. Since the sandwich panel is composed of several (for example 4 to 5) individual sheet metal wall layers, each such sheet metal panel layer may have a thickness of about 0.1 mm, the total weight of such a sandwich panel compared to conventional sheet metal walls with a thickness of sheet metal wall 1.5 mm significantly reduced and thus particularly suitable for stiffening large areas. By using sandwich panels in silencers (instead of conventional sheet metal walls) can thus achieve a significant weight savings. The muffler according to the invention can consequently be manufactured in lightweight construction, it being ensured at the same time that the mechanical or mechanical bending moments required for the reception and transmission of the muffler are present.

Erfindungsgemäß umfasst die selbsttragende Tragstruktur wenigstens einen Zwischenboden. Ein solcher Zwischenboden kann zur Abstützung der Rohranordnung an der selbsttragenden Tragstruktur verwendet werden und somit die mechanische Stabilität des Schalldämpfers weiter verbessern.According to the invention, the self-supporting support structure comprises at least one intermediate floor. Such an intermediate floor can be used to support the pipe arrangement on the self-supporting support structure and thus further improve the mechanical stability of the muffler.

Erfindungsgemäß ist die Sandwichplatte Teil der selbsttragenden Tragstruktur. Dies ermöglicht eine besonders gute Übertragung von dem Schalldämpfer zugeführten Kräften bzw. Drehmomenten über die selbsttragende Tragstruktur, beispielsweise an eine Abführungsleitung der Rohranordnung.According to the invention, the sandwich panel is part of the self-supporting support structure. This allows a particularly good transmission of forces or torques supplied to the muffler via the self-supporting support structure, for example to a discharge line of the pipe arrangement.

Erfindungsgemäß umfasst der Schalldämpfer eine Mantelhaube, welche die Sandwichplatte zu dem Gehäusemantel des Gehäuses des erfindungsgemäßen Schalldämpfers komplettiert. Dies bedeutet, dass das gesamte Gehäuse des Schalldämpfers durch die Sandwichplatte und eine solche Mantelhaube gebildet wird. Dies ermöglicht einen mechanisch stabilen und dennoch technisch sehr einfach herzustellenden Schalldämpfer, so dass die Herstellungskosten eines solchen Schalldämpfers relativ gering gehalten werden können.According to the invention, the muffler comprises a jacket hood, which completes the sandwich panel to the housing shell of the housing of the muffler according to the invention. This means that the entire housing of the muffler is formed by the sandwich plate and such a jacket cover. This allows a mechanically stable, yet technically very easy to manufacture muffler, so that the production cost of such a muffler can be kept relatively low.

In einer weiterbildenden Ausführungsform kann daran gedacht sein, dass der Schalldämpfer einen ersten und einen zweiten Endboden aufweist, welche den Gehäusemantel zu dem Gehäuse komplettieren. Hierzu kann der erste bzw. zweite Endboden jeweils mit dem Gehäusemantel verklebt, verlötet oder verschweißt sein, so dass der Gehäusemantel mit den beiden Endböden ein gasdichtes Gehäuse ausbildet. Da auch den beiden Endböden keine tragende Funktion zukommt, können auch diese vorzugsweise als dünne Blechwände ausgebildet sein. In einer besonders einfach herzustellenden und auch besonders leichtgewichtigen Ausführungsform kann die Mantelhaube integral mit dem ersten oder/und mit dem zweiten Endboden verbunden sein. Dies bedeutet, dass die Mantelhaube sowie der erste und zweite Endboden ein einziges Werkstück ausbilden, welches in der Art einer Haube mit der Sandwichplatte verbunden und insbesondere dieser verschweißt werden kann. Die mit dem ersten und zweiten Endboden integral verbundene Mantelhaube kann dabei in der Art einer Schale ausgebildet sein.In a further embodiment, it may be thought that the muffler has a first and a second end floor, which complete the housing shell to the housing. For this purpose, the first or second end floor can each be adhesively bonded, soldered or welded to the housing jacket, so that the housing jacket with the two end floors forms a gas-tight housing. Since the two end floors have no supporting function, these may also be preferably formed as a thin sheet metal walls. In a particularly easy to manufacture and also particularly lightweight embodiment, the jacket cover can be integrally connected to the first and / or to the second end floor. This means that the jacket hood as well as the first and second end floor form a single workpiece, which in the manner of a hood connected to the sandwich panel and in particular this welded can be. The jacket hood integrally connected to the first and second end floor can be designed in the manner of a shell.

Um eine mechanisch besonders stabile Befestigung der Mantelhaube an der Sandwichplatte sicherstellen zu können, kann in einer besonders bevorzugten Ausführungsform die Mantelhaube in einem Längsschnittsprofil des Schalldämpfers zwei Randabschnitte zur Anbringung an der wenigstens einen Sandwichplatte aufweisen, welche nach außen, vom Gehäuse-Innenraum des Schalldämpfers weg, oder nach innen, zum Gehäuse-Innenraum hin, abstehen.In order to ensure a mechanically particularly stable attachment of the shell hood to the sandwich panel, in a particularly preferred embodiment, the shell hood in a longitudinal section of the muffler have two edge portions for attachment to the at least one sandwich panel, which, to the outside, away from the housing interior of the muffler , or inwards, towards the housing interior, stand out.

Für die effektive Einleitung des von dem erfindungsgemäßen Schalldämpfer zu bedämpfenden Schalls kann der erste oder/und zweite Endboden des Schalldämpfers jeweils eine erste bzw. zweite Durchgangsöffnung aufweisen. Die Rohanordnung kann dabei wenigstens einen Zuleitungs- und ein Ableitungsrohr mit einer Zuleitungs- bzw. Ableitungsöffnung umfassen, welche durch die erste bzw. zweite Durchgangsöffnung von außen in den Gehäuse-Innenraum durchgeführt sind, derart, dass die Zuleitungs- bzw. Ableitungsöffnung in der wenigstens einen Kammer des Schalldämpfers angeordnet ist.For the effective initiation of the sound to be damped by the silencer according to the invention, the first or / and second end floor of the silencer can each have a first or second through-opening. The crude arrangement may comprise at least one supply and discharge pipe with a supply or discharge opening, which are performed through the first and second through-openings from the outside into the housing interior, such that the supply or discharge opening in the at least a chamber of the muffler is arranged.

Um die mechanische Stabilität des erfindungsgemäßen Schalldämpfers weiter zu erhöhen, so dass dieser besonders hohe in den Schalldämpfer eingeleitete Kräfte bzw. Biegemomente aufnehmen kann, kann der wenigstens eine Zwischenboden einen ersten und einen zweiten Endabschnitt aufweisen, wobei sich der erste Endabschnitt dann an der ersten Sandwichplatte und der zweite Endabschnitt an der weiteren Sandwichplatte oder an der Mantelhaube abstützen kann. In dem Zwischenboden kann in einem zwischen den beiden Endabschnitten angeordneten Bereich wenigstens eine Durchgangsöffnung vorgesehen sein, durch welche das wenigstens eine Zuleitungs- oder Ableitungsrohr durchgeführt sein kann. Auf diese Weise kann das Zuleitungs- bzw. Ableitungsrohr mechanisch besonders stabil in dem Schalldämpfer abgestützt werden.In order to further increase the mechanical stability of the silencer according to the invention, so that it can absorb particularly high forces or bending moments introduced into the silencer, the at least one intermediate bottom can have a first and a second end section, the first end section then being attached to the first sandwich panel and the second end portion can be supported on the further sandwich panel or on the jacket hood. At least one through-opening may be provided in the intermediate bottom in an area arranged between the two end sections, through which the at least one supply or discharge pipe can be made. In this way, the supply and discharge pipe can be mechanically supported particularly stable in the muffler.

In einer besonders bevorzugten Ausführungsform kann der wenigstens eine Zwischenboden eine zusätzliche Sandwichplatte (zusätzlich zu der ersten und zweiten Sandwichplatte) sein. In diesem Fall kann mittels der zusätzlichen Sandwichplatte eine besonders hohe mechanische Stabilität in dem erfindungsgemäßen Schalldämpfer erzielt werden. Alternativ kann der wenigstens ein Zwischenboden auch eine Blechwand sein. Diese Variante ist insbesondere dann vorzuziehen, wenn die mechanische Stabilität nicht mittels des Zwischenbodens wesentlich erhöht werden muss, so dass die Blechwand beispielsweise als reine Trennwand zur Auftrennung der Kammer in dem Gehäuse-Innenraum in eine erste und zweite Unterkammer dienen kann, mittels welcher in den Schalldämpfer eingeleiteter Schall besonders gut gedämpft werden kann.In a particularly preferred embodiment, the at least one intermediate floor may be an additional sandwich panel (in addition to the first and second sandwich panels). In this case, a particularly high mechanical stability can be achieved in the silencer according to the invention by means of the additional sandwich plate. Alternatively, the at least one intermediate floor may also be a sheet metal wall. This variant is particularly preferable when the mechanical stability does not have to be substantially increased by means of the intermediate bottom, so that the sheet metal wall can serve, for example, as a pure partition for separating the chamber in the housing interior into a first and second sub-chamber, by means of which in Sound absorber introduced sound can be particularly well damped.

In einer besonders einfachen und kostengünstig herzustellenden Ausführungsform kann die Sandwichplatte mit der weiteren Sandwichplatte bzw. der Mantelhaube mittels Verschweißen, Verkleben oder Verlöten verbunden sein.In a particularly simple and inexpensive to manufacture embodiment, the sandwich panel can be connected to the other sandwich panel or the jacket hood by means of welding, gluing or soldering.

Um die Sandwichplatte besonders gut an der Mantelhaube befestigen zu können, kann die wenigstens eine Sandwichplatte in einem Längsschnittprofil des Schalldämpfers einen bezüglich der Längsrichtung ersten und zweiten Endabschnitt aufweisen, in welchem eine Wanddicke der Sandwichplatte einen geringeren Wert aufweist als in einem zwischen den beiden Endabschnitten angeordneten Bereich der Sandwichplatte. Die Sandwichplatte kann dann an den beiden Endabschnitten mit zu diesen beiden Endabschnitten komplementären Randabschnitten der Mantelhaube vernietet sein.In order to be able to fix the sandwich panel particularly well to the jacket hood, the at least one sandwich panel in a longitudinal section profile of the muffler may have a first and second end section with respect to the longitudinal direction, in which a wall thickness of the sandwich panel has a lower value than in one arranged between the two end sections Area of the sandwich panel. The sandwich panel can then be riveted to the two end portions with complementary to these two end portions edge portions of the jacket cover.

Die Erfindung betrifft des Weiteren eine Abgasanlage, insbesondere für eine Brennkraftmaschine eines Kraftfahrzeugs, mit einem Abgas-Abführungsrohr zum Abführen von Abgas aus der Abgasanlage sowie mit einem Schalldämpfer mit einem oder mehreren der vorhergehend genannten Merkmale. Die Rohranordnung des Schalldämpfers kann dabei ein fluidisch mit dem Abgas-Abführungsrohr verbundenes Zuführungsrohr aufweisen.The invention further relates to an exhaust system, in particular for an internal combustion engine of a motor vehicle, with an exhaust gas removal pipe for discharging exhaust gas from the exhaust system and with a silencer with one or more of the aforementioned features. The tube assembly of the muffler may have a fluidically connected to the exhaust gas discharge pipe feed pipe.

Die vorliegende Erfindung betrifft des Weiteren eine Brennkraftmaschine mit einem Brennraum sowie einer Abgasanlage mit einem oder mehreren der vorhergehend genannten Merkmale, wobei der Brennraum der Brennkraftmaschine mittels eines Verbindungsrohrs fluidisch mit der Abgasanlage verbunden sein kann.The present invention further relates to an internal combustion engine having a combustion chamber and an exhaust system with one or more of the aforementioned features, wherein the combustion chamber of the internal combustion engine can be fluidly connected to the exhaust system by means of a connecting pipe.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.A preferred embodiment of the invention is illustrated in the drawings and will be explained in more detail in the following description.

Es zeigen, jeweils schematisch:

Fig. 1
ein erstes Ausführungsbeispiel eines erfindungsgemäßen Schalldämpfers in einer Längsschnittansicht,
Fig. 2
den Schalldämpfer der Figur 1 in einer Seitenansicht,
Fig. 3
eine nicht zur Erfindung gehörige Variante des Ausführungsbeispiels der Figur 1,
Fig. 4
eine Schnittansicht des Schalldämpfers der Figur 3 gemäß der Linie IV-IV,
Fig. 5
eine Schnittansicht des Schalldämpfers der Figur 3 gemäß der Linie V-V,
Fig. 6
eine Teilansicht der Figur 1,
Fig. 7
eine Variante der Figur 6,
Fig. 8
den erfindungsgemäßen Schalldämpfer als Teil einer Abgasanlage bzw. einer Brennkraftmaschine in einer grobschematischen Darstellung.
It show, each schematically:
Fig. 1
A first embodiment of a silencer according to the invention in a longitudinal sectional view,
Fig. 2
the silencer of FIG. 1 in a side view,
Fig. 3
a not belonging to the invention variant of the embodiment of the FIG. 1 .
Fig. 4
a sectional view of the muffler of FIG. 3 according to the line IV-IV,
Fig. 5
a sectional view of the muffler of FIG. 3 according to the line VV,
Fig. 6
a partial view of FIG. 1 .
Fig. 7
a variant of FIG. 6 .
Fig. 8
the silencer according to the invention as part of an exhaust system and an internal combustion engine in a rough schematic representation.

In den Figuren 1 und 2 ist ein erfindungsgemäßer Schalldämpfer dargestellt und mit 1 bezeichnet. Die Figur 1 zeigt den Schalldämpfer 1 dabei in einer Längsschnittansicht, die Figur 2 in einer Seitenansicht.In the Figures 1 and 2 an inventive silencer is shown and designated 1. The FIG. 1 shows the muffler 1 while in a longitudinal sectional view, the FIG. 2 in a side view.

Der Schalldämpfer 1 umfasst ein Gehäuse 2, welches einen sich in eine Umfangsrichtung U des Gehäuses erstreckenden Gehäusemantel 3 aufweist. Der Schalldämpfer 1 umfasst ferner einen wenigstens eine Kammer 8 aufweisenden Gehäuse-Innenraum 4, welcher von dem Gehäuse 2 umschlossen ist, sowie eine selbsttragende Tragstruktur 5 und eine Sandwichplatte 6. Die Sandwichplatte 6 bildet dabei einen Teil des Gehäusemantels 3 aus. Die selbsttragende Tragstruktur 5 umfasst eine Rohranordnung 7, welche teilweise in dem Gehäuse-Innenraum 4 angeordnet ist. Der Schalldämpfer 1 umfasst ferner eine Mantelhaube 9, welche die erste Sandwichplatte 6 zum Gehäusemantel 3 komplettiert (vgl. Figur 2). Die Sandwichplatte 6 kann mit der Mantelhaube 9 mittels Verschweißen, Verkleben oder Verlöten verbunden sein.The silencer 1 comprises a housing 2, which has a housing jacket 3 extending in a circumferential direction U of the housing. The silencer 1 further comprises a housing interior 4 having at least one chamber 8, which is enclosed by the housing 2, as well as a self-supporting support structure 5 and a sandwich plate 6. The sandwich panel 6 forms a part of the housing shell 3. The self-supporting support structure 5 comprises a tube arrangement 7, which is arranged partially in the housing interior 4. The muffler 1 further comprises a jacket hood 9, which completes the first sandwich panel 6 to the housing shell 3 (see. FIG. 2 ). The sandwich panel 6 may be connected to the jacket hood 9 by means of welding, gluing or soldering.

Betrachtet man die Darstellung der Figur 2, so erkennt man, dass die Mantelhaube 9 aufgrund ihrer schalenartigen Ausbildung die Sandwichplatte 6 nicht nur zu dem Gehäusemantel 3, sondern zu dem gesamten Gehäuse 2 komplettiert. Dies bedeutet insbesondere, dass zur Komplettierung des Gehäusemantels 3 keine zusätzlichen Endböden erforderlich sind, was den Aufbau und damit die Herstellung des erfindungsgemäßen Schalldämpfers 1 stark vereinfacht. In einer alternativen Betrachtungsweise kann man die Mantelhaube 9 auch als integral mit einem ersten und zweiten Endboden verbunden ansehen.Looking at the representation of the FIG. 2 , it can be seen that the jacket hood 9 due to their shell-like design completes the sandwich panel 6 not only to the housing shell 3, but to the entire housing 2. This means in particular that for the completion of the housing shell 3 no additional end floors are required, which greatly simplifies the construction and thus the production of the silencer 1 according to the invention. In an alternative approach, the shroud 9 may also be considered integral with first and second end bottoms.

In einer in der Figur 3 gezeigten, nicht zur Erfindung gehörigen Variante des Ausführungsbeispiels der Figur 1 kann der Schalldämpfer 1' alternativ zu der Mantelhaube 9 eine weitere Sandwichplatte 10', welche Teil der selbsttragenden Tragstruktur ist, sowie eine erste und eine zweite Blechwand 11', 12' umfassen. Diese komplettieren dann zusammen die erste Sandwichplatte 6' zu dem Gehäusemantel 3'. Die Figur 4 zeigt den Schalldämpfer 1' der Figur 3 gemäß der Schnittlinie IV, und die Figur 5 zeigt den Schalldämpfer 1' gemäß der Schnittlinie V.In one in the FIG. 3 shown, not belonging to the invention variant of the embodiment of FIG. 1 the muffler 1 'as an alternative to the jacket hood 9, a further sandwich panel 10', which is part of the self-supporting support structure, and a first and a second metal wall 11 ', 12' include. These then complete together the first sandwich panel 6 'to the housing shell 3'. The FIG. 4 shows the muffler 1 'of FIG. 3 according to the section line IV, and the FIG. 5 shows the muffler 1 'according to the section line V.

Die Sandwichplatte 6' und die weitere Sandwichplatte 10' sowie die erste und zweite Blechwand 11', 12' können in dem Querschnittsprofil des Schalldämpfers 1' vorzugweise im Wesentlichen gegenüberliegend zueinander angeordnet sein. Grundsätzlich sind in weiteren Varianten aber auch andere Anordnungs-Geometrien vorstellbar.The sandwich panel 6 'and the further sandwich panel 10' as well as the first and second panel wall 11 ', 12' may be arranged in the cross-sectional profile of the muffler 1 ', preferably substantially opposite one another. In principle, however, other arrangement geometries are also conceivable in further variants.

In der Variante gemäß den Figuren 3 bis 5, die nicht die Erfindung wiedergibt, bilden die erste und zweite Blechwand 11', 12' gleichzeitig auch einen ersten und einen zweiten Endboden 13', 14' aus, welche den Gehäusemantel 3' zu dem Gehäuse 2' komplettieren, d.h. die Blechwände 11', 12' und die Endböden 13', 14' sind integral miteinander verbunden und bilden eine rahmenartige Struktur in der Art eines umlaufenden U-Profils (vgl. Fig. 4 und 5) aus. In einer Variante können die Blechwände 11', 12' und die Endböden 13', 14' aber auch jeweils separat ausgebildet und miteinander verschweißt sein. Die Endböden 13', 14' bzw. die Blechwände 11', 12' können mit den Sandwichplatten 6', 10' verklebt oder verlötet sein.In the variant according to the FIGS. 3 to 5 not reflecting the invention, the first and second sheet metal walls 11 ', 12' simultaneously also form a first and a second end floor 13 ', 14', which complete the housing shell 3 'to the housing 2', ie the sheet metal walls 11 ' , 12 'and the end floors 13', 14 'are integrally connected to each other and form a frame-like structure in the manner of a circumferential U-profile (see. Fig. 4 and 5 ) out. In a variant, the sheet metal walls 11 ', 12' and the end floors 13 ', 14' but also each formed separately and welded together. The end floors 13 ', 14' or the metal walls 11 ', 12' can be glued or soldered to the sandwich panels 6 ', 10'.

Betrachtet man nun wieder die Darstellung der Figuren 1 und 2, so erkennt man, dass der Mantelboden 9 eine erste bzw. zweite Durchgangsöffnung 15, 16 aufweist, und dass die Rohrstruktur 7 des Schalldämpfers 1 ein Zuleitungs- und ein Ableitungsrohr 17, 18 mit einer Zuleitungs- bzw. Ableitungsöffnung 19, 20 umfasst, welche durch die erste bzw. zweite Durchgangsöffnung 15, 16 von außen in den Gehäuse-Innenraum 4 durchgeführt sind. Die Zuleitungs- bzw. Ableitungsöffnung 19, 20 ist dabei in der Kammer 8 angeordnet. Entsprechendes gilt mutatis mutandis für die Variante des Ausführungsbeispiels gemäß den Figuren 3 bis 5. In diesem Fall kann die erste bzw. zweite Durchgangsöffnung 15', 16' in dem ersten bzw. zweiten Endboden 13', 14' vorgesehen sein (vgl. Fig. 3).Looking again at the representation of the Figures 1 and 2 , it can be seen that the jacket bottom 9 has a first or second through-opening 15, 16, and that the tube structure 7 of the muffler 1 comprises a supply and a discharge pipe 17, 18 with a supply or discharge opening 19, 20, which are performed by the first and second passage opening 15, 16 from the outside into the housing interior 4. The supply or discharge opening 19, 20 is arranged in the chamber 8. The same applies mutatis mutandis mutandis for the variant of the embodiment according to the FIGS. 3 to 5 , In this case, the first or second passage opening 15 ', 16' in the first and second end floor 13 ', 14' may be provided (see. Fig. 3 ).

Zur weiteren Verbesserung der mechanischen Stabilität kann der Schalldämpfer 1, 1' wie in den Figuren 1, 3 und 5 gezeigt zwei Zwischenböden 21, 21' mit jeweils einem ersten und einem zweiten Endabschnitt 22, 23, 22', 23' aufweisen, wobei sich der erste Endabschnitt 22, 22' an der ersten Sandwichplatte 6, 6' und der zweite Endabschnitt 23, 23', an der an der Mantelhaube 9 (vgl. Fig. 1) oder an der zweiten Sandwichplatte 10' (vgl. Fig. 4) abstützt. Die Zwischenböden 21, 21' können mit den Sandwichplatten 6, 6', 10', verklebt oder verlötet und mit der Mantelhaube 9, mit den Blechwänden 11', 12' und mit den Endböden 13, 14' verschweißt sein.To further improve the mechanical stability of the muffler 1, 1 'as in the FIGS. 1 . 3 and 5 shown two shelves 21, 21 ', each having a first and a second end portion 22, 23, 22', 23 ', wherein the first end portion 22, 22' on the first sandwich panel 6, 6 'and the second end portion 23, 23rd ', at the on the jacket hood 9 (see. Fig. 1 ) or on the second sandwich panel 10 '(cf. Fig. 4 ) is supported. The intermediate floors 21, 21 'can be glued or soldered to the sandwich panels 6, 6', 10 'and welded to the jacket hood 9, to the sheet metal walls 11', 12 'and to the end floors 13, 14'.

In den beiden Zwischenböden 21, 21' sind in einem zwischen dem ersten und zweiten Endabschnitt angeordneten Bereich Durchgangsöffnungen 24, 24' vorgesehen, durch welche das Zuleitungs- bzw. Ableitungsrohr 17, 18, 17', 18' durchgeführt sind. Es ist klar, dass in Varianten auch eine andere Anzahl an Zwischenböden in dem Schalldämpfer 1,1' vorgesehen sein kann.In the two intermediate floors 21, 21 ', passage openings 24, 24' are provided in a region arranged between the first and second end sections, through which passages or discharge pipes 17, 18, 17 ', 18' are made. It is clear that in variants also a different number of intermediate floors may be provided in the muffler 1,1 '.

In der Darstellung der Figuren 1, 3 und 5 sind die Zwischenböden 21, 21' als dünne Blechwände ausgebildet. Je nachdem, welche zusätzliche mechanische Versteifung mittels der zusätzlichen Zwischenböden 21, 21' erzielt werden soll, können diese grundsätzlich entweder als mechanisch besonders stabile Sandwichplatte oder als besonders kostengünstig herzustellende dünne Blechwand ausgebildet sein. Auch Kombinationen, derart, dass einzelne Zwischenböden 21, 21' als dünne Blechwand und weitere Zwischenböden 21, 21' als Sandwichplatten ausgebildet sind, sind vorstellbar.In the presentation of the FIGS. 1 . 3 and 5 the intermediate floors 21, 21 'are formed as thin sheet metal walls. Depending on which additional mechanical stiffening is to be achieved by means of the additional shelves 21, 21 ', they can basically be designed either as a mechanically particularly stable sandwich panel or as a thin sheet-metal wall to be produced particularly inexpensively. Also, combinations such that individual shelves 21, 21 'as a thin sheet metal wall and other shelves 21, 21' are formed as sandwich panels are conceivable.

In Varianten des Ausführungsbeispiels können die wenigstens eine Sandwichplatte 6, 6' oder/und der wenigstens eine Zwischenboden 21, 21' Teil der selbsttragenden Tragstruktur 5 sein.In variants of the exemplary embodiment, the at least one sandwich panel 6, 6 'or / and the at least one intermediate floor 21, 21' may be part of the self-supporting support structure 5.

Aus der Darstellung der Figur 1 lässt sich entnehmen, dass die Mantelhaube 9 zur besonders stabilen Befestigung an der Sandwichplatte 6 in einem Längsschnittprofil des Schalldämpfers 1 zwei Randabschnitte 25 aufweisen kann, welche nach außen, vom Gehäuse-Innenraum 4 weg, abstehen. In einer alternativen Variante können die Randabschnitte 25 selbstverständlich auch nach innen, zum Gehäuse-Innenraum 4 hin, abstehen.From the representation of FIG. 1 It can be seen that the jacket hood 9 for particularly stable attachment to the sandwich panel 6 in a longitudinal section profile of the muffler 1 may have two edge portions 25 which project outwardly away from the housing interior 4. In an alternative variant, the edge portions 25 of course also inwardly, the housing interior 4 out, stand out.

Alternativ oder zusätzlich kann die Sandwichplatte 6, 6' in dem Längsschnittprofil des Schalldämpfers 1 einen bezüglich einer Längsrichtung L des Schalldämpfers 1 ersten und zweiten Endabschnitt 26 aufweisen, in welchem eine Wanddicke D der Sandwichplatte 6 einen geringeren Wert D1 aufweist als in einem zwischen den beiden Endabschnitten 26 angeordneten Bereich der Sandwichplatte 6. Dies ist grobschematisch in der Darstellung der Figur 6 dargestellt, welche die Sandwichplatte 6 mit einem Endabschnitt 26 zeigt. In einer Variante können die Endabschnitte 26 auch als Falzabschnitte ausgebildet sein, welche die Randabschnitte 25 der Mantelhaube 9 umgreifen. Dies ist grobschematisch in der Figur 7 gezeigt. Im Bereich der Endabschnitte 26 kann dann die Mantelhaube 9 an der Sandwichplatte 6 zusätzlich mittels Verkleben oder Verlöten befestigt sein. Alternativ ist es selbstverständlich auch vorstellbar, dass die Randabschnitte 25 der Mantelhaube 9 als Falzabschnitte ausgebildet sind, welche die Endabschnitte 26 der Sandwichplatte 6 umgreifen.Alternatively or additionally, the sandwich panel 6, 6 'in the longitudinal section profile of the muffler 1 have a first and second end portion 26 with respect to a longitudinal direction L of the muffler 1 in which a wall thickness D of the sandwich panel 6 is lower than D 1 This is roughly schematic in the representation of the FIG. 6 shown, which shows the sandwich plate 6 with an end portion 26. In a variant, the end portions 26 may also be formed as folded portions which surround the edge portions 25 of the jacket hood 9. This is roughly schematic in the FIG. 7 shown. In the area of the end sections 26, the jacket hood 9 can then additionally be fastened to the sandwich panel 6 by gluing or soldering. Alternatively, it is of course also conceivable that the edge portions 25 of the jacket hood 9 are formed as folded portions which engage around the end portions 26 of the sandwich panel 6.

Wie sich der Darstellung der Figur 6 entnehmen lässt, kann die Sandwichplatte 6 zum Zwecke einer besonders stabilen Befestigung mit der Mantelhaube 9 im Bereich 25 bzw. 26 vernietet sein (vgl. Bezugszeichen 32 in der Figur 6).As the presentation of the FIG. 6 can be, the sandwich panel 6 for the purpose of a particularly stable attachment to the jacket hood 9 in the region 25 or 26 riveted (see reference numeral 32 in the FIG. 6 ).

In der grobschematischen Darstellung der Figur 8 ist gezeigt, dass der Schalldämpfer 1 Teil einer Abgasanlage 27, insbesondere für eine Brennkraftmaschine eines Kraftfahrzeugs, sein kann, welche wiederum mit einem Abgas-Abführungsrohr 30 zum Abführen von Abgas aus der Abgasanlage 27 ausgestattet sein kann. Das Abgas-Abführungsrohr 30 ist dabei mit dem Zuleitungsrohr 17 des Schalldämpfers 1 fluidisch verbunden. Die Abgasanlage 27 wiederum kann Teil einer Brennkraftmaschine 28 mit einem Brennraum 29 sein, wobei der Brennraum 29 der Brennkraftmaschine 28 mittels eines Verbindungsrohrs 31 fluidisch mit der Abgasanlage 27 verbunden ist.In the rough schematic representation of FIG. 8 It is shown that the muffler 1 can be part of an exhaust system 27, in particular for an internal combustion engine of a motor vehicle, which in turn can be equipped with an exhaust gas exhaust pipe 30 for discharging exhaust gas from the exhaust system 27. The exhaust gas removal pipe 30 is fluidly connected to the supply pipe 17 of the muffler 1. The exhaust system 27 in turn may be part of an internal combustion engine 28 having a combustion chamber 29, wherein the combustion chamber 29 of the internal combustion engine 28 is fluidly connected to the exhaust system 27 by means of a connecting pipe 31.

Claims (6)

  1. A silencer (1) for an exhaust system of an internal combustion engine, in particular of a motor vehicle, the silencer (1) comprising:
    - a housing (2) which comprises a housing shell (3) extending in a circumferential direction (U) of the housing (2),
    - a sandwich plate (6), which forms part of the housing shell (3),
    - a housing interior space (4) comprising at least one chamber (8), which is enclosed by the housing (2),
    - a self-supporting support structure (5) which comprises a pipe arrangement (7) at least partially arranged in the housing interior space (4),
    - wherein the self-supporting support structure (5) comprises at least one intermediate floor (21),
    - wherein the at least one sandwich plate (6) is part of the self-supporting support structure (5),
    characterized in that
    - the silencer (1) comprises a shell hood (9) which completes the sandwich plate (6) to form the housing shell (3).
  2. The silencer (1) according to claim 1,
    characterized in that
    the shell hood (9) in a longitudinal section profile of the silencer (1) comprises two marginal portions (25) for attaching to the at least one sandwich plate (6), which project to the outside, away from the housing interior space (4), or to the inside, towards the housing interior space (4).
  3. The silencer (1) according to any one of preceding claims,
    characterized in that the at least one intermediate floor (21) is an additional sandwich plate or a sheet metal wall.
  4. The silencer (1) according to any one of the preceding claims,
    characterized in that
    - the at least one sandwich plate (6) in a longitudinal section profile of the silencer (1) comprises an with respect to the longitudinal direction (L) first and second end portion (26), in which a wall thickness (D) of the sandwich plate (6) has a lower value (D1) than in a region of the sandwich plate (6) arranged between the two end portions (26),
    - the at least one sandwich plate (6) on the two end portions (26) is riveted to the marginal portions (25) of the shell hood (9) which is complementary to these two end portions (26).
  5. An exhaust gas system (27), in particular for an internal combustion engine (28) of a motor vehicle, comprising:
    - an exhaust gas discharge pipe (30) for discharging exhaust gas from the exhaust gas system (27),
    - a silencer (1) according to any one of the preceding claims,
    - wherein the pipe arrangement (7) comprises a feed pipe (17) which is fluidically connected to the exhaust gas discharge pipe (30).
  6. An internal combustion engine (28), comprising:
    - a combustion chamber (29),
    - an exhaust gas system (27) according to Claim 5,
    - wherein the combustion chamber (29) is fluidically connected to the exhaust gas system (27) by means of a connecting pipe (31).
EP13170271.4A 2012-06-13 2013-06-03 Lightweight acoustic muffler Active EP2674585B1 (en)

Applications Claiming Priority (1)

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DE102012209932A DE102012209932A1 (en) 2012-06-13 2012-06-13 Lightweight silencer

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EP2674585A1 EP2674585A1 (en) 2013-12-18
EP2674585B1 true EP2674585B1 (en) 2016-09-07

Family

ID=48537858

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EP13170271.4A Active EP2674585B1 (en) 2012-06-13 2013-06-03 Lightweight acoustic muffler

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US (1) US9163547B2 (en)
EP (1) EP2674585B1 (en)
JP (1) JP5770220B2 (en)
CN (1) CN103485863B (en)
DE (1) DE102012209932A1 (en)

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US10941693B2 (en) 2018-01-18 2021-03-09 Faurecia Emissions Control Technologies, Usa, Llc Vehicle frame with acoustic volume for an exhaust system
FR3143665A1 (en) * 2022-12-19 2024-06-21 Renault S.A.S Exhaust acoustic volume of a motor vehicle with a heat shield

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Also Published As

Publication number Publication date
US9163547B2 (en) 2015-10-20
CN103485863A (en) 2014-01-01
JP2013256953A (en) 2013-12-26
CN103485863B (en) 2016-12-28
JP5770220B2 (en) 2015-08-26
EP2674585A1 (en) 2013-12-18
DE102012209932A1 (en) 2013-12-19
US20130333977A1 (en) 2013-12-19

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